1 ; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s 2 3 ; We shouldn't generate a hardware loop in this case because the initial 4 ; value may be zero, which means the endloop instruction will not decrement 5 ; the loop counter, and the loop will execute only once. 6 7 ; CHECK-NOT: loop0 8 9 define void @foo(i32 %count, i32 %v) #0 { 10 entry: 11 br label %do.body 12 13 do.body: 14 %count.addr.0 = phi i32 [ %count, %entry ], [ %dec, %do.body ] 15 tail call void asm sideeffect "nop", ""() #1 16 %dec = add i32 %count.addr.0, -1 17 %cmp = icmp eq i32 %dec, 0 18 br i1 %cmp, label %do.end, label %do.body 19 20 do.end: 21 ret void 22 } 23
